Motor fuel



July Z6, 1927. `,637,@07

C. E. H. NORTH ET AL MOTOR FUEL Filed A112. 5, 1925 Patented July 26, 1.9.27.

' carbon tetrachloride UNITED. STATES I' v1,637,007 PATENT OFFICE.

Acrnuauirzs n. n. Noma Nn AUGUSTUS H. HUDSON,l or BBEMEBTON, wAsnINGroN.

MOTOB FUEL.

Application-med August 5, 1925. Seria1'No.'48,398.

Our invention relates -broadly toJ means for increasing` the effective power obtainable in l internal combustion engines and moreparticularly 'to an improvement in motor fuels for internal combustion engines.

The object of our invention is to provide means forincreasing the power and reducing the detonative effects ofgasoline, or similarly used petroleum products when utilized as fuels for internal combustion engines. f

` Wehave found that gasoline, and other similarly used petroleum products, when properly treated withV carbon tetrachloride andl employed as fuel in internal combustion engines, show an appreciable increase in the ordinarily available power and a marked decrease in detonative eifect. The effect of carbon tetrachloride is to cushion theydetonative effect ofthe explosive mixture, enabling the expansion of the gases to be utilized directly a's forces against the pistons within the engines cylinders. We have investigated various hydrocarbon fuelsl and have found that the most volatilehydrocarbon fuels require greater addition of carbon tetrachloride thereto. The carbon tetrachloride when added to the h drocarbon fuel researches in the investigation Aof hydrocan,- bon fuel for internal combustion engines` to which have been added in different instances dilfering percentages of carbon tetrachloride by volume.-

The investigations were conducted with gasoline as 'the hydrocarbon-fuel for internal combustion engines. The gasoline was drawn from the same tank -andftreated at the same time under similar conditions with carbon tetrachloride.

In the accompanying drawing the brake horsepower developed by an internalcombustion engine `driven by hydrocarbon fuel with dierent percentages by volume of` added thereto has been illustrated. .i U

Curve No. 1 shows the performance of an internal combustion en e. and the brake horsepower developed t ereby when 0.15%

gasoline fuel.

by volume of carbon tetrachloride is added to the gasoline. Curve No. 2 shows 'the brake horsepower developed when' 0.30%

by volume of tetrachloride is added to the gasoline. Curve No. 3 shows the v'performvolume of carbon tetrachloride and gasoline as illustratedl in curve No. 3, 0.680 pounds of this. fuel .develo ed as much power as 0.724 pounds of gagoline'. I curve No. 4 the mixture developed considerably less power than gasoline without the addition of carbon tetrachloride. The maximumL effect with this gasoline is, therefore, approximately between the limits of 0.45% and\ In comparing the results of the Aactual service and dynamometer tests, we find that the desired percentage range is from 0.05% to 1.5% by volume..

We have conducted-'many service-tests on automobile engines utilizing our motor fuel where no change in carburetor adjustment Vhas been made over the period of the test.

The following demonstrations are cited as examples: l l I Dodgetruck Jcovering ,the same,territory each Aday and with the same load, usingv Standard gasoline alternately with Standard gasoline containing 0.45% by volume of car- .bon tetrachloride; average mileage gain with treated gasoline, 4.1 miles per gallon.

Ford/ sedan, used for business purposes and covering. approximately the same terri-l tory each wee using alternately nion gasoline and Union vgasoline treated with '0.45% by volumefof carbon tetrachloride ain with treated gasoline,

average mileage 3.9 mlles per gal on.

Ford roadster, used for business purposes and driven on paved streets almost entirely, using Standard gasoline ,alternately with the same gasoline treated with 0.45% by volume of carbon tetrachloride; average mileage gain with treated gasoline, 3.8 miles per gallon.

Pilot touring car, used vfor .pleasure pur- The L best results poses and running `on various grades of gasoline alternately with gasoline treated with 0.45% by volume of carbon tetrachloride; average mileage Again with treated gasoline, 3.5 miles per gallon. l

Maxwell touring car, used for pleasure purposes,`running on various grades of gasoline alternately with gasoline treated with 0.45% by volume of carbon tetrachloride; average mileage gain with treated gasoline, 4.2 miles per gallon. The above results were formed from vearefully kept data. r

v The motors of the pilot touring car and F ord roadster were kept under careful observation for a year. 'They r'an remarkably free of carbon and evidencesof corrosion.

The treated gasoline produces smoothness of operation and decidedly better pulling power. The mileage gain more than offsets,`

the cost of carbon tetrachloride used. Mechanical wear is considerably decreased Aby suppression of detonation. rlfhe addition of carbon tetrachloridev to the motor fuel sensibly quiets the action of the engine and per-l mits easier starting of the motor.

While we have described ourl invention with particular reference to gasoline, we desire that it be understood that the carbon tetrachloride may be combined with any hydrocarbon fuel or petroleum product used as a motor fuel for securing the advantageous results described herein.

. What we claim as new and desire to secure by Letters Patent of the United States is: A motor fuel comprising in combination a mixture of gasoline and '0.05% to 1.5% by volume of carbon tethachloride, said carbon tetrachloride operating to suppress detonation in said motor fuel.

In testimony whereof we aiix our signatures.

CHARLES. E. H. NORTH. AUGUSTUS H. HUDSON. 

